Gen F fuel consumption
Discussion
Hi,
This is not a tread about expectancy for the car to be economical.
Just want to make sure it is all ok.
I have finally been driving the car, and I took it abroad, so all sorts of driving have been checked, and experienced.
Worth noting, standard MY14 GenF with the stock speed limiter in place managed 268kmh (167mph). All of that comfortably in 6th gear. If it wasn't for the limiter, it would probably do 180mph, or more? So unlike someone saying a long time ago, gearing would not be an issue preventing greater speed than 170mph.
Back to my actual point. Very steady driving at around 80 - 85mph for over 100 miles would return 21mpg.
Driving at 100mph would return 16mpg. Driving at 130 - 160mph would return 14mpg (logically). We are talking average fuel consumptions over long distances.
The car has done 6k miles.
The reason I query the above is that I hear of people getting way better fuel economy when driving sensibly. 25mpg - 30mpg was not unheard of. The tyre pressures are by the book. One thing I did, was change the exhaust to a 3" catback system by Harrop. I also tried what every LSA owners is supposed to do, i.e. Adjust the bypass valve by the charger. What seems to be a dead easy task to do, I have never seen an increase in the boost pressure going above 59kpa (read on EDI). Was it not supposed to read up to 70kpa post adjustment? Is it likely that I did it wrong, and as a result at steady lower speeds the. Bypass valve never fully closes, and keeps sending charged air through, thus enriching the fuel mixture for no benefit?
Someone tell me Gen F will not get much better on fuel, and I am ok. Just confirm, please. My old VE would return up to 30mpg when I used to have it.
This is not a tread about expectancy for the car to be economical.
Just want to make sure it is all ok.
I have finally been driving the car, and I took it abroad, so all sorts of driving have been checked, and experienced.
Worth noting, standard MY14 GenF with the stock speed limiter in place managed 268kmh (167mph). All of that comfortably in 6th gear. If it wasn't for the limiter, it would probably do 180mph, or more? So unlike someone saying a long time ago, gearing would not be an issue preventing greater speed than 170mph.
Back to my actual point. Very steady driving at around 80 - 85mph for over 100 miles would return 21mpg.
Driving at 100mph would return 16mpg. Driving at 130 - 160mph would return 14mpg (logically). We are talking average fuel consumptions over long distances.
The car has done 6k miles.
The reason I query the above is that I hear of people getting way better fuel economy when driving sensibly. 25mpg - 30mpg was not unheard of. The tyre pressures are by the book. One thing I did, was change the exhaust to a 3" catback system by Harrop. I also tried what every LSA owners is supposed to do, i.e. Adjust the bypass valve by the charger. What seems to be a dead easy task to do, I have never seen an increase in the boost pressure going above 59kpa (read on EDI). Was it not supposed to read up to 70kpa post adjustment? Is it likely that I did it wrong, and as a result at steady lower speeds the. Bypass valve never fully closes, and keeps sending charged air through, thus enriching the fuel mixture for no benefit?
Someone tell me Gen F will not get much better on fuel, and I am ok. Just confirm, please. My old VE would return up to 30mpg when I used to have it.
Hi chaps,
Thanks for replies.
I am not complaining about the fuel economy being bad. Just wanted to ensure it is supposed to be this. My previous experiences with engines going bang, and other problems have made me be more cautious about things.
Still not sure why my boost bypass valve adjustment has made no difference, but hey, as long as it drives well, and develops the power, I am happy
PS. I have found that MY14 featured cupholders in the rear seat base, whereas MY14.5 did not.
Thanks for replies.
I am not complaining about the fuel economy being bad. Just wanted to ensure it is supposed to be this. My previous experiences with engines going bang, and other problems have made me be more cautious about things.
Still not sure why my boost bypass valve adjustment has made no difference, but hey, as long as it drives well, and develops the power, I am happy
PS. I have found that MY14 featured cupholders in the rear seat base, whereas MY14.5 did not.
I would argue, whether my last engine shat itself due to lpg, but would not consider it on LSA. It's too complex with the charger, and no spare wheel well. Also, I have a works pickup and mileage I do in the GTS would mean I'd need 25k miles, or 5 yrs to break even in the first place. Not worth. It's not a commuter car.
All I want to ensure is that the fuel consumption is normal for what it is.
PS. Will be much obliged for the pic.
All I want to ensure is that the fuel consumption is normal for what it is.
PS. Will be much obliged for the pic.
DRC72 said:
BartW said:
It's an import, so benefits from import vehicle RFL, and is better on fuel than my Gen F, assuming maloo would be similar 
No such joy for me, I have to pay full whack due to some of them being badged as Vauxhalls lol.
HappyMidget said:
BartW said:
Might be subjective, but I think I can get around 21mpg when doing steady 90mph.
That is about 300 miles to a tank, with a bit of a tweak to the tune you should see 320-350ish with a nice steady cruise You checked your boost pressure yet?
You got me interested about the map tweaks
Going for its first service end of this month. So perhaps after that you might be having a busy weekend 
Gassing Station | HSV & Monaro | Top of Page | What's New | My Stuff